reading package

My Linux nas server connected to APC SmartUPS using usb cable and I would like to detect a power failure. If power is not restored my server must shutdown when the battery is exhausted. How do I configure and use my APC SmartUPS under Debina / Ubuntu / RHEL / CentOS / Fedora / Scientific Linux operating system for power management?[click to continue…]

I got rsnapshot based backup server up and running for my network under Debian Linux 5.x. But, whenever I run a backup job using the following command: rsnapshot -v -c /root/rsnapshot.server1.conf hourly I get the following messages on screen:

WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/locate”WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/nc.1.gz” WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/jexec-binfmt” WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/servertool”

Q. I’m not able to run nslookup or host command under Debian or Ubuntu Linux. In fact, these commands are missing from my installation. How do I install nslookup and related dns client commands?[click to continue…]

Q. How do I know what packages are available to be updated on my Debian / Ubuntu Linux system?

A. You can use standard command line utility called apt-get or GUI tool called Synaptic Update-Manager.

List all packages which could be updated

To list outdated package use apt-get command has following two options: => -u : Show upgraded packages; Print out a list of all packages that are to be upgraded. => upgrade : It is used to install the newest versions of all packages currently installed on the system

To updated just say yes to prompt – “Do you want to continue”. Alternatively, you can type the following command:$ sudo apt-get update $ sudo apt-get upgrade

Synaptic GUI Package Update Notifier

Synaptic works hand-in-hand with Update-Manager to inform you about updates to the software installed on your system. If software or security updates are available, Update-Manager will display a pop-up message and an icon in the notification area on your GNOME desktop. To update your system, click on the notification icon, enter your password and click OK. (Fig. 01: Synaptic GUI Package Update Notifier [ Image credit Ubuntu Project] )